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Neodymium Magnets are produced by the powder metallurgy process, which is a kind of chemically active powder material with tiny internal pores and cavities, which are easy to be corroded and oxidized in the air. After the material is corroded or the component damaged, it will cause attenuation or even loss of magnetic properties over time, thus affecting the performance and life of the whole machine, so strict anti-corrosion treatment must be carried out before use. At present, Neodymium Magnet anti-corrosion treatment commonly used plating, chemical plating, electrophoresis, phosphating treatment, etc., of which plating as a mature means of metal surface treatment is most widely used.

Neodymium Magnet Manufacturer plating adopts different plating processes according to the different environments of product use, and the surface plating is also different, such as zinc plating, nickel plating, copper plating, tin plating, precious metal plating, etc. Generally, zinc plating, nickel plating+copper+nickel, and nickel plating+copper+chemical nickel plating are the mainstream three processes. Only zinc and nickel are suitable for direct plating on the surface of NdFeB magnets, so multi-layer plating technology is generally implemented after nickel plating. Now has broken through the NdFeB magnet direct copper plating technology difficulties, direct copper plating and then nickel plating is the development trend so that the plating design is more conducive to the NdFeB magnet components of the thermal demagnetization indicators to reach the customer needs.

Nickel is a magnetically conductive material, and the plating has a magnetic shielding effect, which has a slightly greater effect on thin products. The plating layer is more resistant to humidity, heat and high-pressure accelerated aging tests. It is used in atmospheric environments where condensation may occur, for customers who have high requirements for long-term stability of appearance and internal performance. Zinc is a non-conducting material, and the coating has better salt spray resistance. The surface of the product is prone to powder generation after long-term use, and there are some limitations to its application. Used in environments where slight corrosion may occur, the coating has only limited corrosion resistance to short-term pollution discolouration.